What Does An Epidemiologist Study

BPA causes lower sperm count and increased female hormone levels in men

Bottles and cups made and sold for children under age 3 can no longer contain BPA, starting July 1, according to KNDO.com . The ban's goal is to reduce overall lifetime exposure to BPA, starting from the first time an infant drinks from a bottle.

BPA is a chemical found in some plastics and resins, such as food storage containers, water bottles, food packaging and other plastics, and researchers believe this chemical seeps into beverages and food from the plastic, according to the Mayo Clinic .

Weight loss | diet soda and weight gain: The connection can, in ...

In a study that generated headlines like "breeding diet soda," the researchers found that people who drank diet sodas for almost a decade stomach pudge won more than drinking diet sodas.

Researchers at the University of Texas Health Science Center in San Antonio was very measured, writes in his summary:

"Data from this and other prospective studies suggest that the promotion of diet drinks as a healthier alternative can be wrong: one can be free of calories, but not the consequences."

Note that this does not mean fattening sweet lemonade. (See "to register" below.) * As Richard Mattes, a nutrition scientist at Purdue University, stresses: heavy people may simply choose to eat more diet drinks.

Matas has studied how artificial sweeteners affect appetite and food intake. He believes that many studies report an association between diet soda and weight gain is actually a behavioral phenomenon that affects people think they can eat more calories because they have exchanged their regular soda for a Coke Zero.

"There is a defect in the product itself, but that is how people choose to use," he says. "Just added to the diet does not promote weight gain or loss."

The latest study is not the amount of calories consumed, but considering the age, sex, education, region, diabetes status, level of leisure activities, and smoking.

Study co-author Sharon Fowler, an epidemiologist, agrees – to a point. Yes, it is the combination of diet drinks and psychological, he says, but believes that it could also explain why bephysiological chemicals in diet drinks can cause weight gain.

In rodent studies, researchers observed artificial sweetener stimulates the cells of insulin secretion from the pancreas to modify, alter the pH of the intestine, and is related to hunger control cells in the brain. Fowler and colleagues also reported this week that the diabetes-prone mice exposed to aspartame for three months had higher blood sugar than those not exposed to all.

Previous studies have found a link between obesity and consumption of diet drinks.

"My feeling is that something to do here," said Fowler.

However, studies in rodents and associations are far from causality.

Dariush Mozaffarian, a Harvard epidemiologist who has studied recently as a wide range of foods and beverages in a different way to contribute to weight gain, says that zero-calorie sodas would be a good option for those who want to lose weight, said it was a "step" to go "cold turkey" with sweets and soft drinks.

Deltas Key to the Next Generation TOEFL Test, Advanced Skill Practice for the IBT

GI epidemiology

AIDS, Science and Society

Epidemiology, study design and data analysis

Judging Science, Scientific Knowledge and the Federal Courts